吖啶红与铬(Ⅵ)的高灵敏度荧光反应及应用  

Highly Sensitive Fluorescent Reaction of Acridine Red with Chromium(Ⅵ) and Its Application

作　　者：叶存玲[1] 王新明[1] 樊静[2] 冯素玲[2] 

机构地区：[1]中国科学院广州地球化学研究所有机地球国家重点实验室,广东广州510640 [2]河南师范大学化学与环境科学学院河南省环境污染控制重点实验室,河南新乡453007

出　　处：《光谱学与光谱分析》2006年第7期1294-1297,共4页Spectroscopy and Spectral Analysis

基　　金：国家自然科学基金(40203011);河南省自然科学基金(0511021200)资助项目

摘　　要：研究了在硫酸介质中，铬（Ⅵ）氧化吖啶红荧光增强反应的最佳实验条件，建立了测定痕量铬（Ⅵ）的新的高灵敏度荧光分析法。该方法的检出限为0．6μg·L^-1，线性范围为2．0～32μg·L^-1，对含量为4．0和28μg·L^-1的Cr（Ⅵ）标准溶液进行11次平行测定，其相对标准偏差分别为2．0％和1．0％。该法用于电镀液、废铬酸洗液及合金钢中痕量铬（Ⅵ）的测定，与标准样品和二苯碳酰二肼分光光度法进行了对照，获得了满意结果。A simple and highly sensitive fluorimetric method for the determination of Cr（Ⅵ） was developed in the present paper. The method is based on the fluorescence enhancement of acridine red with Cr（ Ⅵ ） in the sulfuric acid medium. The effects of some experimental conditions on the determination of Cr（Ⅵ） were investigated in detail. The detection limit for Cr（Ⅵ） is 0. 6 μg·L^-1 , and the linear range of the determination is 2. 0-32 μg·L^-1. The relative standard deviation of 11 replicate measure- ments is less than 2.0%. The proposed method has been successfully used to determine Cr（VI ） in electroplating solution, waste chromic acid mixture, and alloy steel samples. The results obtained were compared with the certified values of Cr（Ⅵ） in standard samples and those provided by 1,5-diphenylcarbazide method with satisfaction.

关 键 词：铬(Ⅵ) 吖啶红 荧光法 

分 类 号：O657.3[理学—分析化学]